/*
 * Copyright (c) 2019 Apple Inc. All Rights Reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_LICENSE_HEADER_END@
 */

#ifndef ObjCImprovements_h
#define ObjCImprovements_h

// Useful for never getting retain loops with blocks.
#define WEAKIFY(n) __weak __typeof(n) weak_##n = n

#define STRONGIFY(n) _Pragma("clang diagnostic push")\
_Pragma("clang diagnostic ignored \"-Wshadow\"") \
__strong __typeof(n) n = weak_##n; \
_Pragma("clang diagnostic pop");

#define STRONGIFY_OR_RETURN(n) \
STRONGIFY(n) \
if (!n) { return; }

#endif /* ObjCImprovements_h */
